Efficient Metal Halide Perovskite Solar Cells Prepared by Reproducible Electrospray Coating on Vertically Aligned TiO2 Nanorod Electrodes

Jin Hyuck Heo; Kyungmin Im; Jinsoo Kim; Sang Hyuk Im

doi:10.1021/acsami.9b19121

Efficient Metal Halide Perovskite Solar Cells Prepared by Reproducible Electrospray Coating on Vertically Aligned TiO₂ Nanorod Electrodes

Jin Hyuck Heo, Kyungmin Im, Jinsoo Kim, Sang Hyuk Im

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

Vertically aligned TiO₂ nanorod (NR) electrodes with straight macropores enabled a metal halide perovskite (MHP) solution to be fully infiltrated within their structure and, as a result, formed void-free dense MHP films reproducibly during an electrospray-coating process, whereas conventional mesoporous TiO₂ (m-TiO₂) electrodes with three-dimensionally interconnected mesopores formed internal voids by imperfect infiltration of MHP solution. Hence, TiO₂ NR-based MHP solar cells could be more reproducibly fabricated by an electrospray-coating process and exhibited smaller current density-voltage hysteresis with respect to the scan direction and scan rate than the m-TiO₂-based MHP solar cells due to the short and straight electron pathway either by a one-dimensional TiO₂ NR electrode or a densely formed MHP layer within the TiO₂ NR electrode.

Original language	English
Pages (from-to)	886-892
Number of pages	7
Journal	ACS Applied Materials and Interfaces
Volume	12
Issue number	1
DOIs	https://doi.org/10.1021/acsami.9b19121
Publication status	Published - 2020 Jan 8

Keywords

TiO nanorods
ZnO nanorods
electrospray
hysteresis
metal halide perovskite

ASJC Scopus subject areas

Materials Science(all)

Access to Document

10.1021/acsami.9b19121

Cite this

@article{a7900acd4d8240c8a7a03add8fa91e6a,

title = "Efficient Metal Halide Perovskite Solar Cells Prepared by Reproducible Electrospray Coating on Vertically Aligned TiO2 Nanorod Electrodes",

abstract = "Vertically aligned TiO2 nanorod (NR) electrodes with straight macropores enabled a metal halide perovskite (MHP) solution to be fully infiltrated within their structure and, as a result, formed void-free dense MHP films reproducibly during an electrospray-coating process, whereas conventional mesoporous TiO2 (m-TiO2) electrodes with three-dimensionally interconnected mesopores formed internal voids by imperfect infiltration of MHP solution. Hence, TiO2 NR-based MHP solar cells could be more reproducibly fabricated by an electrospray-coating process and exhibited smaller current density-voltage hysteresis with respect to the scan direction and scan rate than the m-TiO2-based MHP solar cells due to the short and straight electron pathway either by a one-dimensional TiO2 NR electrode or a densely formed MHP layer within the TiO2 NR electrode.",

keywords = "TiO nanorods, ZnO nanorods, electrospray, hysteresis, metal halide perovskite",

author = "Heo, {Jin Hyuck} and Kyungmin Im and Jinsoo Kim and Im, {Sang Hyuk}",

note = "Funding Information: This study was supported by the National Research Foundation of Korea (NRF) under the Ministry of Science, ICT & Future Planning (Basic Science Research Program (No. 2014R1A5A1009799), the Technology Development Program to Solve Climate Change (No. 2015M1A2A2055631), the Global Frontier R&D Program of the Center for Multiscale Energy Systems (No. 2018M3A6A7055631)) and the Ministry of Trade, Industry & Energy, Republic of Korea (New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) (No. 20163010012470)). Publisher Copyright: Copyright {\textcopyright} 2019 American Chemical Society.",

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AU - Heo, Jin Hyuck

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AU - Im, Sang Hyuk

N1 - Funding Information: This study was supported by the National Research Foundation of Korea (NRF) under the Ministry of Science, ICT & Future Planning (Basic Science Research Program (No. 2014R1A5A1009799), the Technology Development Program to Solve Climate Change (No. 2015M1A2A2055631), the Global Frontier R&D Program of the Center for Multiscale Energy Systems (No. 2018M3A6A7055631)) and the Ministry of Trade, Industry & Energy, Republic of Korea (New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) (No. 20163010012470)). Publisher Copyright: Copyright © 2019 American Chemical Society.

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N2 - Vertically aligned TiO2 nanorod (NR) electrodes with straight macropores enabled a metal halide perovskite (MHP) solution to be fully infiltrated within their structure and, as a result, formed void-free dense MHP films reproducibly during an electrospray-coating process, whereas conventional mesoporous TiO2 (m-TiO2) electrodes with three-dimensionally interconnected mesopores formed internal voids by imperfect infiltration of MHP solution. Hence, TiO2 NR-based MHP solar cells could be more reproducibly fabricated by an electrospray-coating process and exhibited smaller current density-voltage hysteresis with respect to the scan direction and scan rate than the m-TiO2-based MHP solar cells due to the short and straight electron pathway either by a one-dimensional TiO2 NR electrode or a densely formed MHP layer within the TiO2 NR electrode.

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